What are magnetic materials and what are their characteristics?
Magnetic materials are difficult to be divided into soft magnetic materials and hard magnetic materials after magnetization. It is easy to remove the magnetic material after magnetization. It is called soft magnetic material, and the material which is not easy to be magnetized is called hard magnetic material. Generally speaking, soft magnetic materials have less remanent magnetism, and hard magnetic materials have larger remanence.
Magnetic materials are closely related to information, automation, mechatronics, national defense and the national economy. It is generally believed that a magnetic material is a substance that can produce magnetism directly or indirectly by transition elements such as iron, cobalt, nickel, and their alloys.
The magnetic material is a kind of strong magnetic material, functional material is ancient and very wide range of uses, and the magnetic material as early as 3000 years ago has been recognized and applied, such as Chinese ancient natural magnet as a compass. Modern magnetic materials have been widely used in our daily life, such as the permanent magnetic material is used as the core material used in motor, transformer, magnetic disc memory used as magnetic recording by computer, such as floppy disks.
